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dc.contributor.advisorSuárez, O. Marcelo
dc.contributor.authorHidalgo-Hernández, Ruth G. I.
dc.description.abstractThe tribological properties of a series of aluminum matrix composites reinforced with AlB2 particles developed for machinery parts intended for aerospace and automotive applications were evaluated. This thesis encompasses the microstructure characterization of those composites and the assessment of their tribological response when subject to pin-on-disk wear test. SEM and EDS analyzes permitted to identify the phases present and correlate the composite microstructure with its mechanical and tribological behavior. SEM observations also allowed identifying the wear mechanisms involved during the pin-on-disks tests against a 440 martensitic stainless steel ball. Wear coefficients were contrasted with Brinell and superficial Rockwell hardness. It was possible to establish the effect of chemical composition on the wear volume and wear coefficient for different composites compositions. This will then permit obtaining machinery parts with optimal performance, achieving high durability, high resistance and the reduction of maintenance costs.
dc.description.abstractLas propiedades tribológicas de una serie de compuestos de matriz de aluminio reforzados con partículas de diboridos de aluminio, desarrollados para piezas de maquinarias destinadas a aplicaciones en la industria aeroespacial y automotriz, fueron evaluadas. Esta tesis abarca la caracterización de la microestructura de los compuestos y la evaluación de sus propiedades tribológicas cuando son sometidos a pruebas de de desgaste ”pin-on-disk”. Los análisis de microscopia electrónica de rastreo (SEM) y espectrometría de dispersión de energía permitieron identificar las fases presentes y correlacionar la microestructura del compuesto con su comportamiento mecánico y tribológico. Las observaciones en SEM también permitieron identificar los mecanismos de desgaste presentes durante las pruebas de ”pin-on-disk”. Los coeficientes de desgaste calculados fueron contrastados con la dureza” Brinell” y ”Rockwell” superficial. Fue posible establecer el efecto de la composición química en el volumen removido y el coeficiente de desgaste de las distintas composiciones de los compuestos. Esto permitirá obtener piezas con un rendimiento ´optimo, alta resistencia y la reducción de los costos de mantenimiento.
dc.description.sponsorshipThe Puerto Rico Louis Stroke Alliance for Minority Participation: Bridge to Doctorate Program (NSF Grant N HRD-0601843) for the fellowship that helped support me during my graduate education. This material is based upon work supported by the National Science Foundation under Grants No. DMR-0351449 (PREM Program), HRD-0833112 (CREST Program) and the US Department of Energy, Savannah River through Grant No. DE-FG09 07SR22571.Hardness instrumentation used was acquired with the support from the US Department of Defense through contract No. W911NF-07-1-0611 (HBCU/MI ISP Program). KB Alloys (Reading, PA) is kindly acknowledged for the donation of the master alloys employed in the present research.en_US
dc.subjecttribological characterizationen_US
dc.subject.lcshMechanical wearen_US
dc.subject.lcshMetallic compositesen_US
dc.subject.lcshAluminum-copper-magnesium alloysen_US
dc.titleTribological characterization of Al-Cu-Mg-B composites subject to mechanical wearen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2009 Ruth G. I. Hidalgo Hernándezen_US
dc.contributor.committeeBanerjee, Jay
dc.contributor.committeeSundaram, Paul A.
dc.contributor.representativeRadovan, Henri Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Mechanical Engineeringen_US

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